I wouldn't pursue her right now. Let it rest and get on with your own life. I'm sure there are things that you can place your focus on that would be good for you.
Trust me, the marriage is not ending anytime soon because of your conversation.
If the topic is brought up again, BY HER, you can clarify that you are not interested in being one of her dates, and that as long as she is seeing others you are not interested in seeing her. Or however you want to put it.
I will say along with Puppy though, if you want her to date only you, then you shouldn't be dating either. Unfortunately, I think you attached more significance to your time together than she did.
You know that chances are that she took your willingness to hang out together as a sign that you were ok with her stepping away. Some clarity needs to be brought to that matter when the opportunity arises.
BIll
"Don't tell me the sky is the limit when there are footprints on the moon."
